What are the explicit equation and domain for a geometric sequence with a first term of 2 and a second term of –8? (5 points)

an = 2(–8)n – 1; all integers where n ≥ 1
an = 2(–8)n – 1; all integers where n ≥ 0
an = 2(–4)n – 1; all integers where n ≥ 0
an = 2(–4)n – 1; all integers where n ≥ 1

Question

What are the explicit equation and domain for a geometric sequence with a first term of 2 and a second term of –8? (5 points)
 		
	an = 2(–8)n – 1; all integers where n ≥ 1
	an = 2(–8)n – 1; all integers where n ≥ 0
	an = 2(–4)n – 1; all integers where n ≥ 0
	an = 2(–4)n – 1; all integers where n ≥ 1

anonymous · Answer

How do I find the explicit equation?